Dual Modulator HDR Display Temporal Field Interlacing
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Solution Overview
Problem
Existing high dynamic range (HDR) imaging technologies face issues such as reduced transmission efficiency due to the need for transistors and capacitors in active-matrix LCDs, leading to flicker and color break-up, and the introduction of black frames to mitigate motion blur further reduces light throughput and increases flicker.
Innovation Solution
The method involves generating portions of luminance patterns with different spectral power distributions concurrently with light intensity modulation, using dual modulators to distribute these patterns in temporal fields, thereby reducing flicker and color break-up by interlacing luminance differences across multiple temporal fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If temporal color synthesis is used to display fields of different colors in sequence, then color rendering is improved, but luminance variations between fields cause perceptible flicker
Solution Approach 1:
The patent segments the temporal fields into different spectral power distribution portions and distributes them across multiple fields. By interlacing these portions and modulating light intensity concurrently, the system maintains color rendering while reducing luminance variations between fields, thereby minimizing perceptible flicker.
Solution Approach 2:
The patent employs periodic action by distributing luminance pattern portions across multiple temporal fields in an interlaced manner. This periodic distribution, combined with concurrent light intensity modulation, creates a rhythm that reduces the perceptibility of luminance variations, thereby reducing flicker while maintaining color rendering capabilities.
2Manufacturing precision
If black frames are inserted to reduce motion blur, then motion blur is reduced, but light throughput efficiency decreases and flicker increases
Solution Approach 1:
The patent changes the parameters of the luminance patterns by generating portions with different spectral power distributions and modulating light intensity concurrently. This allows the system to achieve motion blur reduction through interlaced temporal field distribution without requiring complete black frames, thereby maintaining light throughput efficiency while reducing flicker.
3Adaptability or versatility
If LCD pixels transition between different luminance values, then image dynamic range is improved, but optical response time varies causing display instability
Solution Approach 1:
The patent applies preliminary action by predicting luminance patterns associated with multiple spectral power distributions before display. This prediction allows the system to pre-calculate the necessary light intensity modulations, ensuring that LCD pixels transition smoothly between luminance values with consistent optical response times, thereby improving display stability while maintaining luminance range.
Data Source
AI summary
Embodiments of the invention facilitate high-dynamic-range (HDR) imaging by generating portions of spatial and/or temporal luminance patterns with different spectral power distributions substantially concurrent with, for example, the modulation of the light intensity associated with the portions of luminance patterns. The method can include predicting luminance patterns associated with multiple spectral power distributions. The method also can include distributing portions of the luminance patterns in one or more temporal fields. In some embodiments, distributing the portions of the luminance patterns can include interlacing those portions. Further, the method can include modulating light intensities of the luminance patterns to produce an age with other spectral power distributions. In some embodiments, the distribution of the luminance pattern portions can be substantially synchronous with modulating the light intensity of the luminance patterns.